Message transmitting system



Aug. 22, 1939. A- D. ElTzr-:N

MESSAGE TRANSMITTING SYSTEM Original Filed Sept.

l, 1933 4 Sheets-Sheet l INVENTOR zgwzazztw,

u (Q/Lem ATTORNEY Aug. 22, 1939. A. D. EITZEN 2,170,132

MESSAGE TRANSMITTING SYSTEM original Filed sept. 1, 1933 4 sheets-sheet?Fiyi 1,4 f7

ns i @f *L H Z Jes-T* E ll 3 3 H @15.10 14? 4d? l INVENTOR L EL@ y Awww,

BMW

ATTORNEY Aug. 22, 1939. Al D, El-rzEN 2,170,32

MESSAGE TRANSMITTING SYSTEM Original Filed Sept. l, 1933 4 Sheets-Sheet3 ATTORNEY Aug 22, 1939-' A. D. EITZEN vI?.,`i7(),132

MESSAGE TRANSMITTING SYSTEM Originall Filed Sept. l, 1955 4 Sheets-Sheet4 as l g nnugjgggggg; muni INVENTOR zgust EL' tze/1,

BY @(90 Uw@ ATTORNEY Patented Aug. 22, 1939 UNITED STATES PATENT oFFlcEMESSAGE 'IRAN SMITTIN G SYSTEM August D. Eitzen, Rockville Centre, N.Y., assignor to News Projection Corporation, New York, N. Y., acorporation of New York Application September 1, 1933, Serial No.687,811 Renewed October 27, 1937 26 Claims.

electric frequencies to be transmitted to a rel mote station, there tobe retranslated into a printed message.

Among the objects of the present invention, it is aimed to provide animproved system for translating a printed message into electricfrequencies and transmitting such electric frequencies to a remotestation there to be reconverted or retranslated into a printed message.

It is still another object oi' the present invention to provide animproved system for translating a printed message into alternating orpulsating currents and transmitting such currents to a remote stationthere to be reconverted or retranslated into a printed message.

It is still another object ofthe present invention to provide animproved message transmitting system whereby a printed message can betranslated into inaudible frequencies and such frequencies transmittedacross a telephone line or the like without interfering with the use ofthe line for ordinary conversation and the like and retranslating suchinaudible frequencies at the receiving station into a printed messageo'r a pictorial reproduction of the message.

These and other features, capabilities and advantages of the inventionwill appear from the subjoined detail description of specificembodiments thereof illustrated in the accompanying drawings in which-Figure 1 is a side elevation more or less diagrammatically showing asending station made according to the present invention;

Fig. 2 is an enlarged fragmental detail end view of a portion of thesending station illustrated in Fig. 1;

Fig. 3 is an enlarged fragmental plan of the detail illustrated in Fig.2;

Fig. 4 is a side elevation more or less diagrammatically showing areceiving station made according to the present invention; y

Fig. 5 is an enlarged fragmental side elevation of a portion of thereceiving station illustrated in Fig. 4;

Fig. 5a is a detail of a nismgshown in Fig. 5;

Fig. 6 is an enlarged plan more or less diagrammatically showing aportion of the receiving station illustrated in Fig. 4;

Fig. 7 is an enlarged fragmental plan of a portion of the tape in itsposition relative to the sending station illustrated in Fig. 1;

portion of the mecha- Fig. 8 is an enlarged fragmental end elevation ofthe tape showing its position relative to the sending stationillustrated in Flg. 1;

Fig. 9 is a fragmental detail on the line 9--9 y of Fig. 8; and

Fig. 10 is a i'ragmental plan view of a portion of tape usable with thepresent invention having a single row of printed matter.

In the embodiment illustrated in Fig. 1, there is illustrated a ticker Iof the high speed type extensively used today in which the tape feedrollers 2 and 3 have been anchored against operation so that the tape I-may be continually drawn through the ticker at a uniform rate of speed,as for instance by the tape pulling roller 5. The tape 4 in the presentinstance is held in frictional engagement with the pulling roller 5 bythe spring pressed roller 6. The tape puller, 5 in turn is drivinglyconnected to the motor 'l and the shaft of the puller 5 is in turndrivingly connected to the rewind reel 8 by the belt 9, the tape passingfrom the tape puller 5 to the reel 8 after passing under the idler orabutment I0.

Between the ticker I and the tape pulling roller 5, there is disposedthe message translating mechanism now to be described.

It consists essentially of a platform II having two rows of openings ororifices I2 and I3. In order to iron out any vibrations transmitted tothe tape b y the ticker, there is preferably provided a lever I 4 whichpresses the tape against a roller I 5 between the ticker I and theplatform I I. The openings I2 and I3 are preferably round' and aringoutwardly in a downward direction as indicated in Fig. 8.

Preferably the openings I2 are staggered relative to the openings I3 asindicated in Fig. 7. When the tape 4 consists of two rows of printedmatter as indicated in Fig. 7, which is illustrative of a piece ofticker tape in actual size about three-quarters of an inch in width,that is one-half the dimensions illustrated in Fig. 7 and in which thewidth of the characters in the upper row I4 are about three-sixteenthsof an inch and the widest characters, to wit the fractions of the secondrow I5, are about one-quarter of an inch, there will be provided aboutsix openings to each of the rows I2 and I3 in alinement with the upperrow of characters il and about eight openings to each of the rows I2 andI3 in alinement with the second row of characters I 5' as illustrated inFig. l7.

'I'hese rows of openings I2 and I3 are :provided to cooperate with thelight rays produced ,by the lamp I6 and directed by the reflector I'Iface of the tape 4, thereupon to pass through such tape 4 where thelight rays are'not obstructed by characters or portions of charactersformed on the tape d. In other Words, the tape 4 is preferably composedof some transparent yor translucent material which will readily permitthe light rays to pass therethrough and the ink selected for the tickerl is preferably of a character that will produce a light interruptingimpression on the tape d.

Such beams as pass through the tape i as aforesaid will then be receivedby the objective lens unit mounted in'the casing 2@ and then divergeinto independent light rays' corresponding to the uninterrupted openingsi2' and i3 to be received by the light sensitive mechanism consisting ofthe photo-electric cells 2l' and 22, there being a Photo-electric cell2i for each of the openings i2 and a photo-electric cell 22 for each ofthe openings i3. f

Consequently the photo-electric cells 2i and 22 will cooperate with theopenings l2 and i3 to scan the tape d for light interrupting characters.The photo-electric cells 2i and 22 in the present instance are alsoarranged in rows which are staggered relative to one anothercorresponding to the staggered relation of the row of openings l2 to therow of openings i3.

There are preferably provided as many photoelectric cells 2i, 22 asthere are openings i2, i3, twenty-eight in the present instance.

For each photo-electric cell, there is provided an audio frequencysource adapted to generate a distinct vibration or frequency so that inthe present instance, there 'will be provided twentyeight audiofrequency devices or generators, each capable of generating its owndistinct frequency. These audio frequency devices or generators arepreferably as in the present instance, housed in the casing 23. Sincethe devices housed in the casing 23 are adapted each to generate afrequency different from one another, it is obvious that alltwenty-eight frequencies may be electrically/transmitted simultaneouslyacross one and the same electric conductor, as for instance, a telenhoneor telegraph wire or by radio broadcas Furthermore, as is a specicobject of the present vinstance that the frequencies selected may appearin the so-called inaudible ranges characterized by below sixteenvibrations per second or thirty-two thousand (or more vibra-y of audibleor inaudible frequencies selected ac-r cording to the use intended.

sIn the present instance, each photoelectric cell is lconnected to anaudio frequency source lo- `cated in the casing 23 by means ofa controltube and a transformer, each cell being connected to an individualcontrol tube 24 by one conductor 25, which tube 24 is in turn connectedby a. conductor 2 with the i ansformer 2 and which transformer isdirectlyconnected to an audio frequency source in the casing 23 by theconductor 28. Each cell 2l is further connected to a. common conductor29 which in turn is con- 'arcaica nected to the common conductor 30which is connected to a source of current 3l, which source for instanceby the conductor '38 to the tube 39 and by the conductor 4t to thecommon conductor 29, which latter is in turn' connected to the commonconductor 30 as aforesaid, while the tube 39 is connected a transformerdi by the conductor 62, which transformer il is connected to its audiofrequency generating source in the casing 23 by the conductor 62 and isconnected to the telephone line 3l by the conductor 33.

The telephone line 3i is in turn connected to a plurality of receivingunits, twenty-eight in number, each resonantly tuned to one of the audioor even inaudible frequencies generated in the casing 23, whichreceiving units consistV essentially of an audio frequency lt'er andamplier housed in the present instance for convenience in the casing dd.These several receiving units are in turn connected tothe common groundor return wire 45.

Each of the receiving units or channels located in the casing @d isconnected to one of the electromagnets illustrated in Fig. 6. As aninstance, the magnet 66B of the magnets 4G is connected by the conductor4l to one of such receiving units and this magnet 468 is in turnconnected to a common return lead 48 to all of the receiving units bymeans of the conductors and .50. I

The adjacent magnet 461 in the present instance is connected to itsindividual receiving unit by the conductor 5l and also connected to thecommon return lead 48 by the conductors i9 and SQ. For convenience ofdescription, the

magnets in the right hand row will be designated by the referencecharacter 46 and the magnets in the left hand row by the referencecharacter 52. The only other conductor shown between a magnet and itsindividual receiving unit is the conductor 53 connected to the magnet46, although it is of course understood that each .of the magnets d6,will be provided with an individual conductor independently connectingeach magnet with its individual receiving unit. The magnet 4611 in thepresent instance is connected to the common return lead 48 by theconductors. d8a and 48h.

Each of the magnets 46 in the present instance is operatively associatedwith one of the photoelectric cells 22 and each of the magnets B2 withone of the photo-electric cells 2|. Each of the magnets 46 is in turnoperatively associated with an impression pin 55 corresponding inposition, see Fig. 7, to a corresponding opening I3 in the platform Iland each magnet 52 is in turn operatively associated with an impressionpin 54 corresponding in position to a corresponding opening I2 in theplatform Il.

The impression pins 54 and 85 are disposed adjacent to one another tocorrespond es nearly as possible to the positions of the openings I2 andi3. 'I'he free lower ends of the impression pins 54 and 55 are to beinked as hereinafter 75 to be described to produce impression markscorresponding to the inked impressions on the tape 4, the pins 54reproducing such impression marks on another tape at the receivingstation, to wit on the tape 58 shown in Fig. 6 on a scale. of four toone as compared to full size.

In the present instance, the impression pins 54 and 55 are secured tothe lower ends of the shanks 51 and 58 which are slidably mounted in theblock 59. To the block 59, there is attached the container constitutinga reservoir for the ink 8|, the base of which container is provided withopenings to permit the impression pins 54 and 55 to extend therethroughto pass through a pad 82 maintained in position on the lower face of theblock by the bracket 83, the pad being supplied with ink by the seepagewhich passes to it through the openings in the base in which the pins 54and 55 are slidably mounted.

Beneath the bracket 83, the tape 58 is caused to pass from the supplyroll 84 by the tape drawing roller 85.

In the operation of the device, when a character or letter on the tape 4interrupts the passage of light rays therethrough, this interruptionwill be transmitted to the receiving units there to actuate those pins54, 55 which correspond to the openings |2, |3 which have not beenobstructed. The tape 58 will be constantly advanced under the bracket 83to be at all times ready to receive an impression. The pins 54 and 55which have been actuated will be caused to extend a short distancebeyond the lower face of the bracket 8l so that .if the tape as it isintended to do is pressed upwardly against such extending pin 54, 55, animpression of the same will be made. y

It is of course understood that the lends of the pins 54, 55 may beformed to constitute round rectangular or other shaped type markings 4sothat the impression on the tape 88 may consist either of a series ofdots, dashes or the like delining the areas of the letters, markings orthe like to be reproduced.

In the present instance, the hammer action or impression producingaction will be eiected by the platen 88 preferably composed of rubber orthe like which is mounted on the bracket 81 and has extending from itslower face two journals 88 and 89. The journal 88 is pivotally connectedto the link 10 which in turn is connected to the link 1| pivotallyconnected to a xed abutment 12 at its lower end, while the pivotalconnection of the links 10 and 1| with one another is pivotallyconnected to the link 13 which in turn is pivotally connected to thepivotal connection of the links 14 and 15 with one another.

The upper end of the link 14 is pivotally connected to the journal 89and the lower end of the link 15 is pivotally connected to the ilxedabutment 18. The pivotal connection of the links 14 and 15 is in turnconnected by the link 11 with the counter-weighted c rank 18 and thejournal 89 is pivotally connected by the link 19 to the fixed abutment80.

{I'he crank 18 is preferably mounted on a shaft 8| which is drivinglyconnected to the shaft 82 which in turn has a bevelled gear 83 on itslower end in mesh with the bevelled gear 84 on the shaft 85. The shaft85 is provided with a worm 88 in mesh with the worm wheel 81 on thedriven shaft 88. The speed impartedby the motor 8| e to the shaft 8|through the driving connection aforesaid to the shaft 88 will be suchthat the tape 58 will be yadvanced across tne platen 88 at a ratesubstantially equal .to the rate of movement of the master at thescanning transmitter. Preferably the scanning openings i 2, |3 are aboutone-sixty-fourth of an inch in diameter and the diameter of theimpression pins 54, 55 are similarly about one-sixty-fourth of an inch.Consequently for an inch of tape, it would require at least sixty-fourimpressions of the pins 54, 55 to fully cover an inch of tape. So thatit will not be necessary to synchronize the actuation oi' the platen 88with the actuations of the pins 54, 55, it is desirable to have theplaten reciprocated at a speed exceeding sixty-four impressions duringthe movement of an inch of tape or exceeding the speed of sixty-fouractuations of the impression pins 54, 55 during the passage of an inchof tape. In the present instance, the driving connection from the shaft8| to the shaft 88 is such that for the passage of an inch of the tape58, the platen 88 will have been reciprocated into printing position atleast one hundred and twenty-eight times.

'Ihis speed of reciprocation is desired in order to insure picking upevery message that is transmitted by the actuation of the pins 54 and55.

In order to facilitate momentary arrest of the tape 58 during theprinting action, the pulling roller 85 is resiliently connected to thehub or boss 89 fixed to the shaft 88, the hub 89 having a projection orear 90 which is connected by the spring 9| with the inner face of thepulling roller 85 to urge the abutment 92 of the pulling roller 85 intoengagement with the projection 90. For frictionally maintaining the tapein engagement with the driving roller 85, there is provided the springpressed idler 93.

In some instances, it may be desirable to project the reproducedimpressions on the tape 58, in which case, see Fig. 4, the tape iscaused to pass from the pulling roller 85 to and across the lightaperture on the top of the extension 94 of the lamp housing 95 fromwhich the tape 58 is drawn onto the rewind reel 98 which is drivinglyconnected in any suitable manner of slippage compensaton for changingdiameter to the motor 91.

Above the light aperture in the .extension 94, there is provided anobjective lens unit mounted in the casing 98 to receive the imageimpressed light rays from the light aperture of the extension 94 anddirect them onto a deflector not shown and finally onto the screen 99.

The actuation of the shanks 51 and 58 and thereby the pins 54, 55 by themagnets 52, 48 will now be described.

For convenience of assembly, each of the sets of magnets 48 and 52 willbe divided into two rows, an inner row and an outer row. The magnets ofthe inner row in which the magnets 48a and 48b appear each has, see Fig.5a, its core disposed in alinement with the armature |00 formed on thearm |0|. The arm |0| associated with the magnet 48a as an instance, isfixed to the rock shaft |02 which in-turn is provided with an arm 03,see 6, the free end of which is disposed to oscllate in a. slot formedin the stop bar |04. Adjacent the stop bar |04, the arm |03 alines withthe upper end of the shank 58 in the block 59 corresponding to thephoto-electric cell 22 with which the magnet 48a is operativelyconnected. The Shanks 57 and 58 are in turn provided with the'at springs|05 and |08 respectively for maintaining the pins 54 and 55 in raisedposition or always in contact with arms |03, In order to predeterminethe extent of movement of an arm |03, the stop bars |04 are providedwith abutment faces |04a to fix the extent of descent of an arm |03, andthereby the extent of 75 'me arms ma, m in tum are provided with'springs ll for urging the free ends of the arms M33, iii into pindepressing position against the tension of the weaker springs 05, H06.Each Aof the magnets of the outer row, as an instance, see the magnet 46has its core alined with lthe armature 08 on the free end oi the arm 09xed to the rock shaft il@ at its lower end, which rock shaft has fixedto it an arm iii, the free end of which is similarly positioned tooscillate in the bar 604.

`Adjacent the bar EN, the arm Hi alines with the upper end of a shank58, This arm i it is also provided with a spring mi normally to urge itinto pin depressing position against the tension of the weaker springit.

The operative associations of the inner and outer rows of magnets 52with the pins 5l are sub- I stantially identical with that justdescribed with regard to the inner and outer rows of magnets 66.

From the foregoing, it will thus appear that when a character on thetape interrupts the light, the interruption will be transmitted by thecells 2l, 22 to corresponding magnets t5, 52 and that when sointerrupted, the springs itil will be free to depress the arms it, iiiinto pin extending position and that when so extended, the reciprocatingplaten Se will immediately reproduce an impression of the extended pinsonto the tape 56 thereby to reproduce the markings on the tape I.

From the foregoing, it will of course also appear that markings on thetape 4 need not necessarily be produced by a printer, such as theprinter i but can be produced by the human hand and that script whenproduced on the tape 4 in light interrupting ink will be reproduced onthe tape 5t in the same manner.

It will of course also be obvious that instead of` light interruptingmarkings on the master t, the master t may be composed of lightinterrupting material and provided with light passable areas, such forinstance as perforations or transparency or translucency impartingimpressions, in which case a negative instead of a positive picturewould result without departing from the general spirit of theinvention.v

In Fig. 10, there is illustrated a tape 4 having a single row of printedmatter 48. When tape such as the tape 4B is used, it is of courseobvious Y that the light openings l2, i3 can be reduced in number .as aninstance to consist merely of the upper row of openings i2, i3 shown inFig. 7. In this case, the audio frequency sources and re lated partswill of course similarly be reduced in number.

It is of course also obvious that the message impressed on'the mastermay be in code form and that this message in code can in turn` betranslated into pulsating currents and such pulsatingcurrentselectrically transmitted and translated-to actuate recording devices atthe receiving stations to' select characters or portions of characterscorresponding to the code initially transmitted.

The springs |01 in the prent instance effect a prompt extension of thepins Il, 55 into imdescent of the pins 54, 55 and the stops EN abovepression creating position when the armatures iti, 608 connected theretoare released vby the de-energization of the electromagnets 46,52'operatively associated therewith.

The objective lens unit retained in the casing 2G cooperates with thelocation of the openings i2, i3 and of the photo-electric cells 2i, 22relative to one another to produce enlarged and sharply dened images ofselected portions of the master tape ll, thereby to facilitatepositioning the respective parts during assembly with less percentage oferror and consequently facilitate control of the translation of themarkings on the master tape into electrical equivalents during theprocess of dissecting or scanning.

To prevent smudging of the markings on the tape 56 at the receivingstation, the bracket 63 is preferably provided with buttons 63a at theends thereof and disposed in alinement with those portions of the tapedisposed'between and to either sideof the areas of the printed matter.

It is obvious that various changes and modications may be made to thedetails of construcution without departing from the general spirit ofthe invention as set forth in the appended claims.

1. The Vsystem of transmitting messages consisting of a transmittingstation having a record or master composed of alight transmittable tapehaving light interrupting characters impressed i thereon, a pulsatingcurrent generator for generating a plurality of pulsating currentscorresponding to the location of light rays transmitted through saidtape, a light sensitive mechanism operatively associated with saidpulsating current generator, a source of light for directing the lightrays through the unimpressed portion of said record and onto said lightsensitive mechanism in turn to select the pulsating currentscorresponding to the light rays being transmitted, and a. receivingstation having a pulsating current iilter means for lterlng out aplurality of pulsating currents corresponding to the frequencies of saidtransmitting station, a mechanical recording device, and meansoperatively associating said mechanical recording device with saidpulsating current ilter means electrically to control said mechanicalrecording device imaccordance with the pulsating currents transmitted torecord the msage `transmitted.

2. In a message transmitting system, the combination with a transmittingstation having a master and means for impressing a message on thesurface of said master, of a receiving station having a tape, arecording device for mechanically recording a message on said tape, agenerator for translating the message on said master into pulsatingcurrents, devices for electrically transmitting said pulsating currentsto said receiving station, a separator at said receiving station forseparating said pulsating currents, and an electrical controlleroperatively 'associated with said mechanical recording meanselectrically to control said recording means to record on said tape themessage transmitted.

3. In a message transmitting system, the combination with a transmittingstation having a master and means for impressingv a message on thesurface of said master, of a. receiving station having a tape and meansfor recording a message on the surface of said tape, means fortranslating the message on said master into audio frequencies, means forelectrically transmitting said audio frequencies to said receivingstation, and means including magnets operatively associating saidtransmitting means with said recording means to record on said tape themessage transmitted.

4. In a message transmitting system, the cornbination with atransmitting station having a master and means for impressing,a messageon the surface of said master, of a receiving station having a tape andmeans for recording a message on said tape, means including a lightsensitive mechanism for translating the message on said master intoaudio frequencies, means for electrically transmitting said audiofrequencies to said receiving station, and means including magnetsoperatively associating said transmitting means with said recordingmeans to record on said tape the message transmitted.

5. In a message transmitting system, the combination with a transmittingstation having a master and means for impressing a message on thesurface of said master, of a receiving station having a tape and meansfor recording a message on said tape, means including a light sensitivemechanism for translating themessage on said master into audiofrequencies, means for electrically transmitting said audio frequenciesto said receiving station, and means including an audio frequency filteroperatively associating said transmitting means with said recordingmeans to record on said tape the message transmitted.

6. In a message transmitting system, the combination with a transmittingstation having a light transmittable master and means for impressing amessage on said master in light interrupting characters, of a receivingstation having a tape and means for recording a message on said tape, anaudio frequency generator, a light sensitive mechanism operativelyassociated with said audio frequency generator, a source of lightoperatively associated with said master for directing light rays throughthe unimpressed portion of said tape onto said light sensitive mechanismin turn to cause they selection of generated audio frequenciescorresponding to the message impressed, means including an audiofrequency filter for transmitting the audio frequencies selected to saidreceiving station, and means including magnets operatively associatingsaid audio frequency filter with said recording means to record on saidtape the message transmitted.

7. In a message transmitting system, the combination with a transmittingstation having a light transmittable master and means for impressing amessage on said master in light interrupting characters, of a receivingstation having a tape and a device for recording a message on said tape,an audio frequency generator, a light sensitive mechanism operativelyassociated with said audio frequency generator, a source of lightoperatively associated with said master for directing light rays throughthe unimpressed portion of said tape onto said light sensitive mechanismin turn toy cause the selection of generated audio frequenciescorresponding to the section of the message impressed, means includingan audio frequency filter for transmitting the audio frequenciesgenerated to said receiving station, and means including magnetsoperatively associating said audio frequency filter with said recordingdevices to make inoperative those recording devices which correspond tothe section of the message transmitted whereby the message will berecorded by the recording devices not so made inoperative. .s

8. In a message transmitting system, the combination with a lighttransmittable master, of means for impressing light interruptingmarkings on said master, a stationary platform having a plurality ofopenings, a light sensitive mechanism having a plurality of devices eachcorresponding to one of said openings, means for drawing said masteracross said platform, a source of light for directing light rays throughthe openings in said platform not obstructed by light interruptingmarkings onto corresponding devices, and an audio frequency generatorhaving devices for generating a plurality of frequencies correspondingto the number of openings in said platform, each device of saidgenerator being operatively associated with one of the devices of saidlight sensitive mechanism to select the frequency corresponding to itsassociated unobstructed opening.

9. In a message transmitting system, the combination with a lighttransmittable tape, of a printer for impressing a message in lightinterrupting areas on said tape, a stationary platform having a row ofopenings, a plurality of light sensitive devices one corresponding toeach of such openings, means for drawing said tape across said row ofopenings, a source of light for directing light rays through theopenings in said platform not obstructed by light interrupting areasonto corresponding light sensitive devices, and an audio frequencygenerator having devices for generating a plurality of differentfrequenciesl corresponding to the number of openings in said platform,each device of said generator being operatively associated with one ofsaid light sensitive devices to control the frequency corresponding toits associated unobstructed opening.

10. In a message transmitting system, the combination with a lighttransmittable tape, of a printer for impressing a message in lightinterrupting markings on said tape, a stationary platform having aplurality of rows of openings, a' plurality of light sensitive devices,one corresponding to each of such openings, means for drawing said tapetransversely across said rows of openings, a source of light fordirecting light rays through the openings in said platform notobstructed by light interrupting markings onto corresponding lightsensitive devices, an audio frequency generator having devices forgenerating a plurality of different frequencies corresponding to thenumber of openings in said platform, each device of said generator beingoperatively associated with one of said light sensitive devices tocontrol the frequency corresponding to its associated unobstructedopening, and a receiving station having a recorder operativelyassociated with said generator to reproduce the message formed on saidtape.

11.l In a e transmitting system, the combination with a transmittingstation having a generator for generating a plurality of audiofrequencies corresponding to the section of markings on a tape, of areceiving station having an audio frequency filter operativelyassociated with said generator, a plurality of printing bars, means foryieldably maintaining said bars in extended impression ,creatingposition, means including a,

plurality of magnets, one for each printing bar operatively associatedwith said audio frequency lter for withdrawing the printing barscorresponding to the audio frequencies selected to leave extended thoseprinting bars corresponding to the markings on the tape at thetransmitting station, a platen, means for drawing a second tape acrosssaid platen adjacent to said printing bars, and means for reciprocatingsaid platen into impression receiving contact with said printing bars.

12. In a message transmitting system, the combination with atransmitting station having a generator for generating a plurality ofaudio frequencies corresponding to thesection of markings constituting amessage, of a receiving station having an audio frequency lter, saidfilter having a resonantly tuned device forming a channel correspondingto each of the audio frequencies generated by said generator, aplurality of printing bars, means for yieldably maintaining said bars invextended printing position, means operatively associating each of saidbars with one of said ltering devices for withdrawing the printing barscor.

responding to the audio frequencies generated and leave extended thoseprinting bars corresponding to the markings constituting the message, aplaten, means for drawing the tape across said platen adjacent tosaidprinting bars, and means for reciprocating said platen into impressionreceiving contact With-said printing bars.

13. In a message transmitting system, the combination with atransmitting station 'having a generator for generating a plurality ofaudio frequencies corresponding to a succession of points constitutingthe sections of characters, of a receiving station having an audiofrequency lter, said filter having a plurality of ltering devices eachcorresponding to one of the audio frequencies generated, a plurality ofpoint producing printing bars, a block in which said printing bars arevertically slidable, an ink reservoir associated with said block,vmeansfor yieldably maintaining said bars in depressed impression creatingposition, means operatively associated with said filtering devices forwithdrawing the printing bars corresponding to the audio frequenciesgener ated, a platen, means for drawingv a tape between said platen andsaid printing bars, and means for reciprocating said platen intoimpression receiving contact with said printing bars at a rate per unitof time corresponding to a number per unit of time exceeding the numberof impression areas required to cover a unit length of tape per unit oftime.

14. In a message transmitting system, the combination with a master, ofVmeans for impressing light interrupting markings on said master, aplatform having a plurality of openings, a light sensitive mechanismhaving a plurality of devices each corresponding to one ofald openings,means for drawing said master across said platform, a

source of light for directing light rays through the openings in saidplatform not obstructed by light interrupting markings ontocorresponding devices, an audio frequency generator forgenerating aplurality of frequencies corresponding to the number of openings in saidplatform, said generator being operativelyrassociated with said lightsensitive mechanism to select the frequencies corresponding tounobstructed openings, a receiving station having an audio frequencyfilter, said filter having a plurality of filtering devices, onecorresponding to each frequency generated by said generator, a pluralityof printing bars, means for yieldably maintaining said barsv in extendedimpression creating position, means operatively associated with saidfiltering devices for withdrawing the printing bars corresponding to theaudio frequencies generated, a platen,

anonce means for reciprocating said platen into impression receivingcontact with said printing bars.

15. In a message transmitting system, the combination with atransmitting station having a master and means for impressing a messageon said master in light interrupting characters, of a receiving stationhaving a tape and a device for recording a message on said tape, apulsating current generator for generating inaudible frequencies, alight sensitive mechanism operatively associated with said pulsatingcurrent generator, a source of light operatively associated with saidmaster for directing light rays through the unimpressed portion of saidtape onto said light sensitive mechanism in turn to select and controlsaid generated inaudible frequencies correspending to the messageimpressed, means including a wire for electrically transmitting said,inaudible frequencies to said receiving station without interferingwith the use of said wire for carrying the normal audible voicecurrents, and means including an inaudible frequency filter operativelyassociating said wire 'with said recording device to record on said tapethe message transmitted.

16. In a message transmitting system, the combination with atransmitting station having a light transmittablev master and means forim-v pressing a message on said master in light interrupting characters,of a receiving station having a tape and a device for mechanicallyrecording a message on said tape, an audio frequency generator, alightsensitive mechanism at the transmitting station operatively associatedwith said audiov frequency generator, a source of light optransmitted.

17. In a message transmitting system, the combination with a master, ofmeans for impressing light interruptingRmarkings on said master, aplatform having a row of openings, a light sensitive mechanism having aplurality of devices, each corresponding to one of said openings, meansfor drawing said master longitudinally across said row of openings, asource of light for directing lighj; rays through openings in saidplatform not obstructed by light interrupting markings ontocorresponding devices, an audio frequency generator for generating aplurality of frequencies corresponding to the number of openings in saidplatform, said generator being operatively associated with said lightsensitive mechanism to select and control the frequencies correspondingto unobstructed openings, a receiving station having an audio frequencylter, said lter having a plurality of filtering devices, onecorresponding to each frequency generated by said generator, a row ofprinting bars corresponding in number and position to the openings insaid platform, means for yieldably maintaining said bags inl extendedimpression creating position, means'operatively associated with saidnltering devices for withdrawing the printing bars corremeans fordrawing a tape across said platen, and' \sponding to. the audiofrequencies selected,y a

platen, means for drawing a tape longitudinally across said row of barsin the same direction that the master is drawn across said openings, andmeans for reciprocating said platen into impression receiving contactwith said printing bars.

18. In a message transmitting system, the combination with atransmitting station having a generator for generating a plurality ofaudio frequencies corresponding to the area of markings on a tape, of areceiving station having an audio frequency filter operativelyassociated with said generator, a plurality of printing bars, means foryieldably maintaining said bars in extended impression creatingposition, means including a plurality of magnets, one for each printingbar operatively associated with said audio frequency lter forwithdrawing the printing bars corresponding to the audio frequenciesselected to leave extended those printing bars corresponding to themarkings on the tape at the printing station, a platen, a tape pullerfor actuating said tape puller continuously to draw a second tape acrosssaid printing bars, actuating means for said tape puller, means foryieldably connecting said tape puller to said actuating means in orderto compensate for any retarding action imparted to the tape during theprinting action, and means for reciprocating said platen into impressionreceiving contact with said printing bars.

19. In 'a message transmitting system, the combination with atransmitting station having a generator 'for generating a plurality ofaudio frequencies corresponding to the areas of markings `on a tape. f areceiving station having an audio frequency filter operativelyassociated with said generator, a plurality of printing bars, means foryieldably maintaining said bars in extended impression creatingposition, means including a plurality of magnets, one for each printingbar operatively lassociated with said audio frequency filter forwithdrawing the printing bars corresponding to the audio frequenciesselected to leave extended those printing bars corresponding to the'markings on the tape at the transmitting station, a platen, means fordrawing at a uniform rate of speed a second tape across said platenadjacent to said printing bars, means for reciprocating said platen intoimpression receiving contact with said printing bars, an inspection areaand a second tape drawing means for drawing said second tape across saidinspection area, said first drawing means being disposed in advance ofsaid inspection area. to cooperate with said second drawing means tomaintain the tape smooth while crossing said inspection areawithout anyauxiliary control.

20. In a. message transmitting system, the combination with atransmitting system having a master and means for impressing a messageon said master in light interrupting characters. a platform having tworows of openings', a plurality of light sensitive devices, onecorresponding to each of said openings. means for drawing said tapelongitudinally across said rows of openings, a source of light fordirecting light rays through the openings in said platform notobstructed by light interrupting markings onto corresponding lightsensitive devices, an audio frequency generator for generating aplurality of different frequencies corresponding to the number ofopenings in said platform, said generator being operatively associatedwith said light sensitive devices to generate the frequenciescorresponding to the unobstructed openings, a receiving station havingan audio frequency nlter, said filter having a plu- 7 rality offiltering devices, one corresponding to each frequency generated by`said generator, two rows of printing bars each corresponding inposition and location to one of for yieldably maintaining said bars inextended impression creating position, means operatively associated withsaid filtering device for withdrawing the printing bars corresponding tothe audio frequencies selected, a platen, means for drawing a tapeacross said platen, and means for reciprocating said platen intoimpression receiving contact with said printing bars.

21. A receiving station for a message transmitting system having anaudio frequency filter, a plurality of printing bars, means foryieldably maintaining said bars in extended impression creatingposition|` means including a plurality of magnets, one for each printingbar operatively associated with said audio frequency iilter forwithdrawing the printing bars corresponding to the audio frequenciesselected to leave extended those printing bars corresponding to themarks to be produced, a platen, means for drawing a tape across saidplaten adjacent to said printing bars, and means for reciprocating saidplaten into impression receiving contact with said printing bars.

22. A receiving station for a. message transmitting system having anaudio frequency filter, said filter having a resonantly tuned deviceforming a channel corresponding to each of the audio frequenciesgenerated, a plurality of printing bars. means for yieldably maintainingsaid bars in extended printing position, means operatively associatingeach of said bars with one of said filtering devices for withdrawing theprinting bars corresponding to the audio frequencies generated and leaveextended those printing bars corresponding to the marks to be produced,a platen, means for drawing the tape across said -platen adjacent tosaid printing bars, and means for reciprocating said platen intoimpression receiving contact with said printing bars. y

23. A receiving station for a message transmitting system having anaudio frequency nlter, said filter having a plurality of filteringdevices each corresponding to one of the audio frequencies generated, aplurality of point producing printing bars, a block in which saidprinting bars are vertlcally slidable, an ink reservoir associated withsaid block, means for yieldably maintaining said bars in depressedimpression creating position, means operatively associated with saidfiltering devices for withdrawing the printing bars corresponding to theaudio frequencies generated, a platen, means for drawing a tape betweensaid platen and said printing bars, and means for reciprocating saidplaten into impression receiving contact with said printing bars at arate per unit of time corresponding to a number per unit of timeexceeding the number of impression areas required to cover a unit lengthof tape per unit of time.

24. A receiving station for a message transmitting system having aprinter, said printer having a plurality of printing bars, means foryieldably maintaining said bars in extended impression creatingposition. means including a plurality of magnets for controlling theactuation of said printing bars, a platen, means for continuouslydrawing a tape across said platen adjacent to said printing bars, meansfor continuously reciprocating said platen into impression receivingcontact 'with said printing bars while said tape is said openings, meansAbeing fed by said tape drawing means, actuating u means operativelyassociated with said reciprogating means, means for yieldably connectingsaid tape drawing means to said actuating means in order to compensatefor any retarding action imparted to the tape during the printingaction, an inspection area, a second tape drawing means for drawing saidtape across said inspection area, a continuously operating motor; and aslippage device for operatively connecting said second tape drawingmeans with said motor to compensate for any variation in speed impartedto the tape by said yieldable means.

25. The system of transmitting messages consisting of a transmittingstation having a record or master composed of a light transmittable tapehaving light interrupting characters impressed thereon, a pulsatingcurrent generator for generating a. plurality of pulsating currentscorresponding to the location of light rays transmitted through saidtape, means operatively associating said pulsating current generator andsaid light transmittable tape to select the pulsating currents requiredto dene the message to be transmitted, and a receiving station having apulsating current lter means for iiltering out a plurality of pulsatingcurrents corresponding to the frequencies of said transmitting station,amechanical recording device, and means operatively associating saidmechanical recording device with said current filter means electricallyto control said mechanical recording device in accordance with thepulsating currents transmitted to record the message transmitted.- y

26. In a message transmitting system, the combination-with atransmitting station having a master and means for impressinga messageon the surface of said master, of a receiving station having a tape andmeans for recording a message on said tape, means including a lightsensitive mechanism for translating the message on said. master intoaudio frequencies, means for electrically transmitting said audiofrequencies to said receiving station, and means operatively associatingsaid transmitting means with said recording means to record on said tapethe message transmitted.

AUGUST D. EI'IZEN.

